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coincellhell.c

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  • coincellhell.c 7.33 KiB
    /* * Copyright (c) 2023 Carl Klemm <carl@uvos.xyz>
     * All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without modification,
     * are permitted provided that the following conditions are met:
     *
     *  * Redistributions of source code must retain the above copyright notice, this
     * list of conditions and the following disclaimer.
     *  * Redistributions in binary form must reproduce the above copyright notice,
     * this list of conditions and the following disclaimer in the documentation and/or
     * other materials provided with the distribution.
     *  * Neither the name of %ORGANIZATION% nor the names of its contributors may be
     * used to endorse or promote products derived from this software without specific
     * prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
     * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
     * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    #define _POSIX_C_SOURCE 199309L
    
    #include <stdint.h>
    #include <stdlib.h>
    #include <time.h>
    #include <stdio.h>
    #include <assert.h>
    
    #include "coincellhell/coincellhell.h"
    #include "usbshm.h"
    #include "usbcommands.h"
    
    #define VID 0xfe17
    #define PID 0x08dc
    
    static void usleep(uint64_t microseconds)
    {
    	struct timespec ts;
    	ts.tv_sec = microseconds / 1000000;
    	ts.tv_nsec = (microseconds % 1000000) * 1000;
    	nanosleep(&ts, NULL);
    }
    
    int coincellhell_connect(struct coincellhell* hell, uint16_t serial)
    {
    	int ret;
    	hell->priv = malloc(sizeof(*hell->priv));
    	if(!hell->priv)
    		return -1;
    	
    	ret = usbshm_init(hell->priv, NULL, hell);
    	if(ret)
    		return -2;
    
    	unsigned char serialStr[5];
    	snprintf((char*)serialStr, sizeof(serialStr), "%04hu", serial);
    
    	ret = usbshm_open(hell->priv, VID, PID , serial == 0 ? NULL : serialStr);
    	if(ret)
    		return -3;
    	return 0;
    }